Linux command: grep 用grep命令匹配一行多个字符串 How to use grep to match multiple strings in the same line? grep 'string1\|string2' filename 1. grep -E "string1|string2" filename 1. How can I grep for a string that begins with a dash/hyphen? 1. Quote AND/OR escape 1. Code: ...
If you do not specify a file and search all files in a directory using the asterisk (*), the output prints the number of results specified in the command fromeveryfile. The output also shows the filename that contains the matches. Display Number of Lines Before or After a Search String ...
If this option is used multiple times or is combined with the -e (--regexp) option, search for all patterns given. The empty file contains zero patterns, and therefore matches nothing. -i, --ignore-case Ignore case distinctions in patterns and input data, so that characters that differ...
As we mentioned earlier in our explanation of how to search for a string, you can wrap text inside quotes if it contains spaces. The same method will work for tabs, but we’ll explain how to put a tab in your grep command in a moment. Put a space or multiple spaces inside quotes t...
The output will return results from all files thegrepcommand found in the/var/log/directory and its subdirectories. Conclusion In this tutorial, you learned how to use grep to search multiple words or string patterns in a file. The guide also showed you how to use extended grep. ...
grep - print lines matching a patterngrep [OPTIONS] PATTERN [FILE...] grep [OPTIONS] [-e PATTERN | -f FILE] [FILE...]
Using grep -e option you can pass only one parameter. Use multiple -e option in a single command to use multiple patterns for the or condition. grep -e pattern1 -e pattern2 filename For example, grep either Tech or Sales from the employee.txt file. Use multiple -e option with grep ...
可以看到,当前目录下有一个 testfile 文件,它里面只有一行 "This is a test string." 字符串。 grep "string" testfile 命令会在 testfile 文件中查找 "string" 字符串,找到后打印出对应的行。 grep "string" "testfile" 命令也是在 testfile 文件中查找 "string" 字符串,即使用双引号把 testfile 括起来...
Search String in Gzipped Files 11. Match Regular Expressions in Files Theegrep commandis another derivative that stands for “Extended Global Regular Expression”. It recognizes additional expression meta-characters suchat + ? |and(). [ You might also like:What’s Difference Between Grep, Egrep,...
Grep is a command-line option used to find a specific string from inside a file or multiple files or from an output of a command but it can be used only in Linux. For Windows, the grep alternative is findstr. Since Windows users are not used to use command-line for smaller things, ...